CN100454869C - Wireless communication method and wireless communication apparatus - Google Patents

Wireless communication method and wireless communication apparatus Download PDF

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Publication number
CN100454869C
CN100454869C CNB2005800014427A CN200580001442A CN100454869C CN 100454869 C CN100454869 C CN 100454869C CN B2005800014427 A CNB2005800014427 A CN B2005800014427A CN 200580001442 A CN200580001442 A CN 200580001442A CN 100454869 C CN100454869 C CN 100454869C
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China
Prior art keywords
beacon
radio communication
communication device
slot
time slot
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Expired - Fee Related
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CNB2005800014427A
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Chinese (zh)
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CN1906893A (en
Inventor
土居裕
三村政博
松本泰辅
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

A beacon slot position control section (205) of a radio communication apparatus constituting a radio network system which detects whether empty beacon slots are present in a beacon period. When an empty beacon slot is present before the period in which the radio communication apparatus transmits a beacon, a movable counter (206) starts counting a specified number of super frames. When the count is completed, the radio communication apparatus transmits a beacon of the radio communication apparatus at the earlier empty beacon slot. Consequently, since the empty beacon slots are eliminated and the beacon period is compacted, even if the number of radio communication apparatuses joining the radio network system fluctuates dynamically, the radio communication apparatus can perform radio communication with high efficiency and less waste of consumed electricity.

Description

Wireless communications method and radio communication device
Technical field
Wireless communications method and radio communication device when the present invention relates in cordless communication network, carry out self-organizing (ad hoc) communication.
Background technology
For a long time, as described wireless communications method and radio communication device, for example have the spy and open the wireless communications method of putting down in writing and radio communication device in the 2003-229869 communique.Figure 42 has shown that the spy opens the wireless communications method of putting down in writing in the 2003-229869 communique, has shown in wireless network, does not dispose control station, the wireless communications method of direct communication between the radio communication device.
In Figure 42, radio communication device sends reception time sequence information, receive window information and the receiving cycle management of information information of having put down in writing the message pick-up starting position that shows oneself (M1～M4) at interval with official hour.Can receive other radio communication device of this management information, close with the communicator sequence number of corresponding radio communication device and link up, storage reception sequential and receive window, receiving cycle.Then, this other radio communication device is asked in the corresponding radio communication device according to the reception sequential of communication counterpart and receive window, receiving cycle when information transmits and is received the starting position, sends information with this sequential.
In addition, all radio communication devices send beacon and (to call " beacon period " in the following text) (C1, C5) exchange of management information in the management information exchange zone at separately beacon slot.
But, method with the past, because beacon period is the set time, so do not knowing to send in advance in the Radio Network System of how many beacons, exist following problem, that is, the radio communication device that adds in this Radio Network System when reality lacks under a lot of situations than the node number that presupposes, in beacon period free time many, communication efficiency is bad.
In addition, the time of beacon period, treating that for whole nodes accepting state continues action, the beacon period that surpasses necessary length has consumed too much power, so the waste of power consumption has increased.
And, existing under other the situation of Radio Network System that adopts identical communication the neighbour, beacon period is long more, and the possibility of conflict or data communication conflict will be high more between beacon period.
On the other hand, add radio communication device in this Radio Network System and be under the situation of the number bigger than the node number that presupposes, the idle time slot deficiency of beacon and radio communication device in the Radio Network System has appearred identifying oneself with.
Summary of the invention
Count dynamic change even the purpose of this invention is to provide a kind of radio communication device that joins in the Radio Network System, the also few wireless communications method of waste of the still good and power loss of communication efficiency.
Wireless communications method of the present invention, it makes radio communication device in beacon period beacon not sent each other with conflicting, radio communication device before as the beacon slot during the beacon that sends oneself, detects whether idle beacon slot is arranged in beacon period.When detecting idle beacon slot, the counting of the superframe of beginning defined amount finishes standby before to the counting of the superframe of described defined amount oneself the beacon slot of beacon slot position to the described free time is moved.Then, radio communication device, to comprise and occupy information to the sender information of the mobile status information of the mobile treatment state of the own beacon slot position of other radio communication device notice and beacon period and add to beacon, described beacon period is occupied the information identifier and the beacon slot position of radio communication device of described mobile status information that comprised the mobile status information that receives from other radio communication device, specific notification, and sends at oneself beacon slot.Then, radio communication device through behind the superframe of defined amount, moves oneself the beacon slot of beacon to the described free time and send.In addition, radio communication device occupies the user mode that information is determined beacon slot according to the mobile status information and the beacon period of the beacon of the radio communication device that receives.
Thus, radio communication device is owing to can change the length of beacon period as required, so can eliminate the disadvantage of the loss of the reduction of the communication efficiency that the node number produces or power consumption in the beacon period of regular length.In addition, the notice of the mobile treatment state of radio communication device counting by beginning superframe etc. just can be tackled other the variation of beacon message that is sent in identical beacon period.In addition, the beacon message arrival of sending to inferior contiguous radio communication device will postpone 1 beacon period, but radio communication device is waited for moving of beacon slot position with superframe unit, like this, can absorb this delay.Also have in addition, radio communication device is owing to also can notify mutually and time relevant information of beacon slot of the radio communication device of vicinity, so by the mobile beacon time slot, the radio communication device of communication counterpart can be avoided the beacon collision with other radio communication device that may communicate by letter.
In addition, wireless communications method of the present invention is characterized in that, the counting of the superframe of defined amount does not carry out during the beacon of other radio communication device exists before the beacon slot from oneself finished to beacon period.
Thus, can guarantee to have only the radio communication device of countdown, be the radio communication device that has changed unique beacon slot its neighbour.Therefore, can not cause the state of affairs that moves to identical beacon slot position with other radio communication device simultaneously, and can carry out the action of shrinking back of beacon period.
In addition, wireless communications method of the present invention, the counting that can also be the superframe of defined amount is more than 2.
Thus, moving of beacon slot position to 1 beacon period of information arrival delay that time contiguous radio communication device sends beacon, but can absorb this delay by the mobile of beacon slot position by waiting for superframe unit.
In addition, wireless communications method of the present invention, occupy information by beacon and beacon period that radio communication device is received, when detecting the change as the beacon infrastructure of the configuration of the beacon slot position of radio communication device, also carry out the detection of idle beacon slot and move the mobile processing of the beacon slot position of oneself to described idle beacon slot.
Thus, in the following time of situation that is in dynamic change beacon infrastructure, the reduction action that can restrain oneself and detect it dispersedly and carry out beacon period.
In addition, the mobile status information in the wireless communications method of the present invention is count value or the sign to the mobile counting of the superframe of defined amount counting.
Thus, under the situation of service marking, the transceive data between radio communication device can be limited to 1 bit of irreducible minimum, so can make call duration time very short.
In addition, wireless communications method of the present invention, it is characterized in that, at least two time slots that radio communication device will begin from the time slot at the rear of beacon infrastructure are guaranteed with time slot as the entrant who does not carry out data communication, by new adding or add wireless network again when beginning the transmission of beacon, will from described entrant with the time slot of selecting at random the time slot as own beacon slot position transmission beacon.
Thus, under the initiate situation of radio communication device, or because of the geographical position move and situation that the radio communication device that repeated other radio communication device beacon slot position adds again under, can with these radio communication devices with identical algorithm combination in the beacon infrastructure of Radio Network System.
In addition, wireless communications method of the present invention, it is characterized in that, also have radio communication device and pay the step that is added on the beacon with the beacon slot length information, described beacon slot length information is represented from the position of the forefront of described beacon slot to the length of the rear time slot of the described beacon infrastructure of oneself recognizing.The described radio communication device described beacon slot length information received from neighbour's radio communication device, the beacon slot length of maximum and described entrant with the length of time slot and during do not carry out data communication, and accept beacon.
Thus, be positioned at neighbour's the radio communication device of neighbour's radio communication device, when the entrant who is used in this detection begins to send beacon with time slot, also can receive this beacon.
Wireless communications method of the present invention, mobile status information also comprise the mobile destination time slot position information of the mobile intended destination of the beacon slot position of representing radio communication device; Radio communication device, beyond the beacon slot that other radio communication device of sending beacon before beacon slot to the beacon period from oneself finishes has been specified with mobile purpose time slot position information, detect under the situation that has idle beacon slot, select in the beacon slot of described free time any one, as the radio communication device notice of mobile purpose beacon slot position to other, and the counting of the superframe of beginning defined amount.
Thus, radio communication device, beacon slot is competed even each moves the destination, by the countdown in 1 cycle, can make a plurality of beacons move to that contracting gives up the throne puts.
In addition, wireless communications method of the present invention is in the beacon slot of radio communication device in the free time, when carrying out the selection of the beacon slot that is positioned at the forefront judged, if described radio communication device itself is not the time slot that is positioned at rear, then do not select the time slot of the free time of forefront.
In addition, wireless communications method of the present invention, radio communication device are selected beacon slot arbitrarily in the beacon slot of free time.
Thus, with confirm mutual mobile destination between the beacon after select differently successively, can begin a plurality of reductions actions simultaneously.
In addition, wireless communications method of the present invention, radio communication device, in the process of the superframe of counting defined amount, count value at oneself is under the peaked situation, detect whether there is other radio communication device from mobile status information, perhaps occupy to detect whether there is other radio communication device the information with peaked count value from beacon period with peaked count value.In addition, radio communication device is under the situation of maximum-1 in oneself count value, detects whether there is other radio communication device from mobile status information.And, radio communication device, in oneself count value neither maximum is not again under the situation of maximum-1, from mobile status information, detect whether there is other radio communication device, perhaps occupy other radio communication device that detects the value that whether has count value+1 information from beacon period with oneself with identical count value.In addition, radio communication device when detecting other radio communication device, continues counting when described other radio communication device is positioned at the time slot position at rear, and oneself count value is resetted.
Thus, radio communication device always suitably selects idle time slot and contracting expeditiously to move back beacon period, and, can streamline ground in the cycle contract a countdown and to move back a plurality of beacons.
In addition, wireless communications method of the present invention when receiving the beacon period that has the count value identical with own count value beyond maximum or 0 in counting when occupying information, is ended to count, and oneself count value is reset to maximum.
Thus, the radio communication device of inferior vicinity so that to differ 1 superframe streamline ground arranged side by side when mobile with the self radio communicator, can prevent to drop into identical beacon slot position in advance.
In addition, wireless communications method of the present invention is characterized in that, the beacon slot of the free time of the mobile destination of the beacon slot of oneself is the beacon slot that is positioned at the free time of forefront.
Thus, radio communication device can carry out a series of reduction action more at high speed.
Radio communication device of the present invention comprises: the beacon receiving element, and it receives beacon, extracts frame; The frame identifying unit, it judges whether the frame that is extracted is beacon frame, to occupy information beacon period is recorded in the record cell, and record gives to the described beacon period of described beacon frame and occupies information, the radio communication device mobile status information of mobile beacon time slot position whether that described beacon period is occupied the identifier of radio communication device in the transmission source that information comprises the receiving slot position of beacon, specific described beacon and expression transmission source; The beacon slot position control unit, it occupies information according to whole beacon periods of writing down in the record cell, when in beacon period, detecting beacon slot idle before the beacon slot of oneself, in mobile counter, set count value, receive the notice of countdown and indicate the change of the beacon slot position of oneself from described mobile counter with the superframe of the own defined amount of beacon slot before the beacon slot of free time moves; Beacon sends indicating member, its detect by the beacon slot position control unit indicated, oneself time slot position, and indication letter target transmission; Frame constitutes the unit, it receives the indication that sends indicating member from this beacon, constitutes to comprise that the described beacon period that is generated by received beacon is occupied information, oneself mobile status information and the beacon frame of the beacon slot length information of the total length of the beacon slot representing to try to achieve from the beacon that oneself receives.
Thus, can construct the radio communication device of the wireless network that is constructed as follows: promptly can not cause the state of affairs that moves to identical beacon slot position and so on other radio communication device simultaneously, exchanges data self-discipline with irreducible minimum reduces action dispersedly, simultaneously by turning into to communicating by letter on the same group mutually with the geographic mobile neighbour of the radio communication device that can not communicate by letter so far.
In addition, radio communication device of the present invention is characterized in that, does not carry out the counting of the superframe of defined amount during the beacon existence of mobile counter other radio communication device before the beacon slot from oneself finished to beacon period.
Thus, can guarantee the only radio communication device of countdown, be the radio communication device that has changed unique beacon slot its neighbour.Therefore, can not cause the state of affairs that moves to identical beacon slot position with other radio communication device simultaneously, can carry out the reduction action of beacon period.
In addition, radio communication device of the present invention is characterized in that, the counting of the superframe of stated number is more than 2.
Thus, the beacon message that sends to inferior contiguous radio communication device arrives and postponed for 1 beacon period.But, moving of beacon slot position can absorb this delay by waiting for superframe unit.
In addition, radio communication device of the present invention, it is characterized in that, the beacon slot position control unit, occupy information by the beacon and the beacon period that receive, when the change that detects as the beacon infrastructure of the configuration of the beacon slot position of radio communication device, carry out idle beacon slot detection, and move the mobile processing of the beacon slot position of oneself to the beacon slot of described free time.
Thus, be in the following time of situation that beacon infrastructure dynamically changes, radio communication device can be to its reduction action of restraining oneself and detecting dispersedly and carrying out beacon period.
In addition, radio communication device of the present invention, mobile status information are the count value or the signs of mobile counter of the superframe of counting defined amount.
Thus, radio communication device can be limited to the transceive data between radio communication device 1 bit of irreducible minimum under the situation of having used sign, call duration time is shortened.
In addition, radio communication device of the present invention, it is characterized in that, frame constitutes at least 2 time slots that the unit will begin from the time slot at the rear of being positioned at of beacon infrastructure and is provided with time slot as the entrant who does not carry out data communication, the beacon slot position control unit, will send indicating member as own beacon slot position to beacon from the time slot that the entrant selects with slotted random and indicate by new adding or add Radio Network System again when beginning the transmission of beacon at this radio communication device.
Thus, even under the situation that the radio communication device that has repeated because of the radio communication device that moves other in initiate radio communication device or geographical position and beacon slot position adds again, can be in the beacon infrastructure of Radio Network System with identical algorithm combination.
In addition, radio communication device of the present invention, it is characterized in that, the frame identifying unit the beacon slot length information received from neighbour's radio communication device, the beacon slot length of maximum and described entrant with the length of time slot and during, accept beacon; Frame constitute the unit the beacon slot length of described maximum and described entrant with the length of time slot and during do not carry out data communication.
Thus, at the initiate radio communication device of the neighbour of the radio communication device that is positioned at the neighbour, when beginning to send beacon in time slot, the entrant of this detection can receive this beacon.
Radio communication device of the present invention, mobile status information also comprise the mobile destination time slot position information of the mobile intended destination of the beacon slot position of representing radio communication device.And, the beacon slot position control unit, the specified beacon slot of mobile destination time slot position information that sent other radio communication device of beacon before finishing to beacon period by the beacon slot from oneself exists under the situation of idle beacon slot in addition, the beacon slot of described free time is recorded in the record cell as the mobile status information of beacon slot position, mobile destination with oneself, the counting of stipulating is set in the mobile counter.And frame constitutes the unit, constitutes to comprise oneself the beacon frame of mobile status information that is recorded in the record cell.
Thus, radio communication device is notified to oneself mobile destination time slot other radio communication device, maybe can detect other the predetermined mobile destination time slot that moves of radio communication device, therefore, even predetermined moving to than oneself more the next radio communication device also can be avoided it and carry out the mobile processing of beacon slot position to other idle time slot is parallel.
In addition, radio communication device of the present invention, other radio communication device that sent beacon at the beacon slot position control unit before the beacon slot from oneself finished to beacon period is scheduled to the mobile beacon slot time slot of free time in addition, and the beacon slot that will be positioned at the forefront is appointed as mobile destination beacon slot.
Thus, radio communication device can be from the idle time slot of forefront successively, and mobile beacon time slot concurrently.
Utilize the present invention as mentioned above, the algorithm that the self-discipline of the radio communication device by Radio Network System disperses can make conflicting to the minimum ground enforcement dynamically changeable lengthization of beacon period of beacon.Thus, dynamically change, also can become the radio communication that communication efficiency is good, power consumption is also few even add the number of the radio communication device of Radio Network System.
Description of drawings
Fig. 1 is the allocation plan of radio communication device of formation that forms the Radio Network System of embodiments of the present invention 1;
Fig. 2 is the block diagram of formation of the radio communication device of expression embodiments of the present invention 1;
Fig. 3 is the figure of formation of the beacon frame of expression embodiments of the present invention 1;
Fig. 4 is the figure of the beacon slot state tableau format of expression embodiments of the present invention 1;
Fig. 5 is the flow chart of the beacon period reduction action of expression embodiments of the present invention 1;
Fig. 6 is the flow chart that processing is determined in the beacon slot position of expression embodiments of the present invention 1;
Fig. 7 A is the figure that the radio communication device of expression embodiments of the present invention 1 adds fashionable time slot state;
Fig. 7 B is the figure that the radio communication device of expression embodiments of the present invention 1 adds fashionable time slot state;
Fig. 7 C is the figure that the radio communication device of expression embodiments of the present invention 1 adds fashionable time slot state;
The figure of the time slot state when Fig. 8 A is the radio communication device adding back of expression embodiments of the present invention 1, mobile time slot position;
The figure of the time slot state when Fig. 8 B represents the radio communication device adding back of embodiments of the present invention 1, mobile time slot position;
The radio communication device that Fig. 9 A represents embodiments of the present invention 1 is the figure of the time slot state when the neighbour not;
The radio communication device that Fig. 9 B represents embodiments of the present invention 1 is the figure of the time slot state when the neighbour not;
The radio communication device that Fig. 9 C represents embodiments of the present invention 1 is the figure of the time slot state when the neighbour not;
Figure 10 A represents the radio communication device of embodiments of the present invention 1 not behind the neighbour, the figure of the time slot state during the reduction release of beacon period;
Figure 10 B represents the radio communication device of embodiments of the present invention 1 not behind the neighbour, the figure of the time slot state during the reduction release of beacon period;
Figure 10 C represents the radio communication device of embodiments of the present invention 1 not behind the neighbour, the figure of the time slot state during the reduction release of beacon period;
Figure 11 is the mutual allocation plan of radio communication device that moves of embodiments of the present invention 1;
Figure 12 A is the figure of time slot user mode of the radio communication device of expression embodiments of the present invention 1;
Figure 12 B is the figure of time slot user mode of the radio communication device of expression embodiments of the present invention 1;
Figure 13 A is the figure of time slot user mode of the radio communication device of expression embodiments of the present invention 1;
Figure 13 B is the figure of time slot user mode of the radio communication device of expression embodiments of the present invention 1;
Figure 14 A is the figure of time slot user mode of the radio communication device of expression embodiments of the present invention 1;
Figure 14 B is the figure of time slot user mode of the radio communication device of expression embodiments of the present invention 1;
Figure 15 A is the figure of time slot user mode of the radio communication device of expression embodiments of the present invention 1;
Figure 15 B is the figure of time slot user mode of the radio communication device of expression embodiments of the present invention 1;
Figure 16 is the allocation plan of the radio communication device of expression embodiments of the present invention 1.
Figure 17 A is the figure of time slot user mode of the radio communication device of expression embodiments of the present invention 1;
Figure 17 B is the figure of time slot user mode of the radio communication device of expression embodiments of the present invention 1;
Figure 18 is the flow chart that processing is determined in the beacon slot position of expression embodiments of the present invention 2;
Figure 19 is the allocation plan of the radio communication device of embodiments of the present invention 2;
Figure 20 A is the figure of the time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 2 is moved;
Figure 20 B is the figure of the time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 2 is moved;
Figure 20 C is the figure of the time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 2 is moved;
Figure 21 A is the figure of the time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 2 is moved;
Figure 21 B is the figure of time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 2 is moved;
Figure 22 A is the figure of the time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 2 is moved;
Figure 22 B is the figure of the time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 2 is moved;
Figure 23 is the flow chart that processing is determined in the beacon slot position of expression embodiments of the present invention 3;
Figure 24 A is the figure of the time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 3 is moved;
Figure 24 B is the figure of the time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 3 is moved;
Figure 24 C is the figure of the time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 3 is moved;
Figure 24 D is the figure of the time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 3 is moved;
Figure 24 E is the figure of the time slot user mode during the reduction of the radio communication device of expression embodiments of the present invention 3 is moved;
Figure 25 is the figure of formation of the wireless communication system of expression present embodiment 4;
Figure 26 A is the time diagram of the superframe of present embodiment 4;
Figure 26 B is the time diagram of the superframe of present embodiment 4;
Figure 27 is the format chart of the beacon slot state table of expression present embodiment 3;
Figure 28 is the figure of formation of the beacon frame of expression present embodiment 3;
Figure 29 is the allocation plan of the radio communication device of present embodiment 4;
Figure 30 is the figure of formation of the beacon frame of expression present embodiment 4;
Figure 31 be the expression embodiments of the present invention radio communication device beacon period in conjunction with the figure of time slot user mode in the action;
Figure 32 represent embodiments of the present invention radio communication device beacon period in conjunction with the figure of time slot user mode in the action;
Figure 33 represent embodiments of the present invention radio communication device beacon period in conjunction with the figure of time slot user mode in the action;
Figure 34 represent embodiments of the present invention radio communication device beacon period in conjunction with the figure of time slot user mode in the action;
Figure 35 represent embodiments of the present invention radio communication device beacon period in conjunction with the figure of time slot user mode in the action;
Figure 36 represent embodiments of the present invention radio communication device beacon period in conjunction with the figure of time slot user mode in the action;
Figure 37 represent embodiments of the present invention radio communication device beacon period in conjunction with the figure of time slot user mode in the action;
Figure 38 represent embodiments of the present invention radio communication device beacon period in conjunction with the figure of time slot user mode in the action;
Figure 39 represent embodiments of the present invention radio communication device beacon period in conjunction with the figure of time slot user mode in the action;
Figure 40 represent embodiments of the present invention radio communication device beacon period in conjunction with the figure of time slot user mode in the action;
Figure 41 represent embodiments of the present invention radio communication device beacon period in conjunction with the figure of time slot user mode in the action;
Figure 42 is the figure of the wireless communications method of expression prior art.
Symbol description
101 to 107,1101 to 1105,1601 to 1604,1901 to 1905,2901 to 2908 radio communication devices
111 to 116,1111 to 1115,1611 to 1614,1911 to 1915,2911 to 2918 communication zones
200 antennas
201 wireless L1 processing units
202 frame identifying units
203 record cells
204 upper layers of processing unit
205 beacon slot position control units
206 move counter
207 frames constitute the unit
208 beacons send indicating member
2501 to 2503 mobile networks
Embodiment
(execution mode 1)
Fig. 1 is the figure that shows the configuration of the radio communication device that forms the formation of implementing Radio Network System of the present invention.
In Fig. 1, radio communication device A (101) can send and receive respectively in the scope of communication zone 111 to 116 mutually to radio communication device F (106).Promptly, radio communication device A (101) can communicate by letter with radio communication device B (102), C (103), D (104) respectively, radio communication device B (102) can communicate by letter with radio communication device A (101), D (104) respectively, radio communication device C (103) can communicate by letter with radio communication device A (101), D (104), E (105) respectively, radio communication device D (104) can communicate by letter with radio communication device A (101), B (102), C (103), F (106) respectively, and radio communication device E (105) can communicate by letter with radio communication device C (103).In addition, suppose that radio communication device G (107) does not add this wireless network at first.
Fig. 2 is the block diagram that shows the formation of these radio communication devices.
In Fig. 2, wireless L1 processing unit 201 will become digital signal from the analog signal conversion that antenna 200 receives, delta frame, or frame transform become analog signal, send from antenna 200.This antenna 200 is omnidirectional antennas, sends electric wave.This is wireless, and L1 processing unit 201 is corresponding with beacon receiving element of the present invention.
It is beacon frame or Frame that frame identifying unit 202 is used to differentiate wireless L1 processing unit 201 received frames.
Fig. 3 is the figure that shows the formation of beacon frame in this beacon period.
In Fig. 3, in beacon sender information 301, put down in writing device id 303 as the device id of the radio communication device that sends this beacon itself, put down in writing counter 304, also put down in writing the beacon slot length 305 of the beacon slot length of grasping as the radio communication device that sends this beacon as the count value of mobile counter 206 described later.In addition, beacon period is occupied information 302 will be with device id and the Counter Value put down in writing in the beacon sender information 301 in the received beacon frame of previous superframe, each beacon is recorded in respectively in device id 306 and the counter 307, the time slot position of this beacon that receives is recorded in beacon slot position 308.
Record cell 203 record is contained in beacon sender information 301 and beacon period and occupies the possession state of each beacon slot in the information 302.
The beacon slot state tableau format of Fig. 4 displayed record in record cell 203.
In Fig. 4, by each beacon slot record timeslot number 401, use the device id 402 of the radio communication device of this time slot, the user mode 403 and the classification 404 thereof of time slot.Whether the radio communication device of this user mode 403 these time slot positions of expression the change of plan time slot position, and is set with the value of counter 304,307.In addition, classification 404 expression be corresponding time slot received beacon (among the figure) with " beacon " expression still expression notified and occupy information by beacon period and occupied (among the figure, using " BPOIE " to represent).
In addition, upper layer processing unit 204 carries out the above protocol processes of network layer.
The beacon slot state table that is write down in the beacon slot position control unit 205 reference record unit 203 is if having idle time slot then carry out processing for the time slot position that moves oneself in the place ahead of beacon period.
The superframe of mobile counter 206 countings before beginning to move the beacon slot position of oneself set the value more than 2 usually.
Frame constitutes unit 207 and reads the information that needs from record cell 203, generates beacon period to occupy information 302.And frame constitutes unit 207 and generates beacon sender information 301 according to the information from beacon slot position control unit 205, constitutes the beacon frame that comprises management information.In addition, frame constitutes the data composition data frame that unit 207 receives from upper layer of processing unit 204.
Beacon sends the timer function that indicating member 208 has the counting shift time, detects in beacon period the time slot position of oneself.And beacon sends 208 pairs of frames of indicating member and constitutes unit 207 indications send the moment from the frame that is constituted to wireless L1 processing unit 201.
Action, the effect of the radio communication device mobile beacon time slot that as above constitutes are described.
Fig. 5 is the flow chart of the reduction action of beacon period of showing that the radio communication device of present embodiment carries out.
At first, frame identifying unit 202 judges whether the frame that receives from other radio communication device is beacon frame (step S501).
Frame identifying unit 202 is being judged to be under the situation of beacon frame, in the device id 402 and user mode 403 in the timeslot number of time slot position in the beacon slot state table that record cell 203 is write down, that be equivalent to received beacon, write down the value of device id 303 with the counter 304 of received beacon sender information 301.In addition, in classification 404, set beacon and receive (Beacon) (step S502).
In addition, frame identifying unit 202, the beacon period in being equivalent to received beacon frame is occupied in device id 402 and the user mode 403 in the timeslot number of the beacon slot position of being put down in writing in the information 302 308, the value of recording equipment ID306 and counter 307.In addition, in classification 404, set beacon period and occupy information (BPOIE).In addition, occupy information 302 for the whole beacon periods in this beacon frame, carry out to the record that occupies the beacon slot state table of information 302 based on this beacon period.
Next, beacon sends indicating member 208 and judges whether be the time slot position (step 503) that sends the beacon of oneself, and under the situation that is delivery time, indication constitutes unit 207 to frame and sends beacon frame (step 504).
On the other hand, under the situation that is not delivery time, beacon sends indicating member 208 and judges whether beacon period crossed (step 505), if do not have, then is back to step 501.Like this, the processing of carrying out from step 501 to step 505 finished until beacon period repeatedly, and thus, the relevant time slot state of whole beacon frames received in beacon period just is recorded in the record cell 203.
In addition, this beacon period, be taken at the length of the entrant who goes up, added again 3 time slots maximum in the beacon slot length 305 of received whole beacon sender information 301 with time slot (entry slot).So-called entrant uses time slot, is the time slot that the new radio communication device that adds and add network sends beacon, selects any time slot in 3 time slots.Thus, can force down the probability of the initial beacon collision when having a plurality of initiate radio communication device at the same time.
In addition, radio communication device of the present invention occupies the time slot state that information 302 can also be learnt next neighbour's radio communication device by beacon period.
Next, at step S505, when arriving the concluding time of beacon period, beacon slot position control unit 205 carries out the beacon slot position and determines to handle (step S506).
Next, 202 standbies of frame identifying unit finish until superframe, at this end cycle the moment return step S501 (step S507).
Here, determine that about above-mentioned beacon slot position processing spec is as follows.
Fig. 6 is the figure that processing is determined in the beacon slot position of display radio communicator.
At first, beacon slot position control unit 205, based on the beacon slot state table that is write down in the record cell 203, whether affirmation exists variation (step S601) in the formation (hereinafter referred to as " beacon infrastructure ") of last time beacon slot.Exist in beacon infrastructure under the situation that changes, beacon slot position control unit 205 confirms whether there is idle time slot (step S602) in the place ahead time slot (time slot in more close front).Exist under the situation of idle time slot, beacon slot position control unit 205, be reset to show count value in the mobile counter 206 peaked full (below, be recited as " Full ", making maximum in the present embodiment is ' 3 '.)。In addition, under the situation that does not have idle time slot, beacon slot position control unit 205 makes mobile counter 206 be ' 0 ' (step S604).
On the one hand, at step S601, the beacon infrastructure in last time does not have under the situation of variation, and beacon slot position control unit 205 begins to carry out the countdown of mobile counter 206.Then, judge whether mobile counter 206 becomes ' 0 ', when being ' 0 ' owing to be not have idle state forwardly in the time slot, so end process (step S605).
On the one hand, under mobile counter 206 was situation more than ' 1 ', beacon slot position control unit 205 was according to the user mode 403 (step S606) of beacon slot state table inspection than the time slot at the rear, beacon slot position of oneself.
Then, as long as user mode 403 has one not to be under the situation of " 0 ", beacon slot position control unit 205 is judged to be than the countdown that oneself preferentially begins to be used for the change of beacon slot position, sets in mobile counter 206 and keeps Full (being " 3 " in the present embodiment) (step S607).Like this, the radio communication device of the beacon slot position at rear has the mobile priority of beacon slot position by making more, can save meaningless repeatedly to the mobile processing of idle time slot.In addition, at step S607, be to have reset to Full, but also can be to reset to 0 method.In this case, favourable part be can simultaneously manage away from the reduction of beacon period in place, but in order to reduce, will wait for that also there is the possibility that increases reduced time in 1 super frame period number of times more.
On the other hand, time slot all is under 0 the situation, oneself to have the right that move prepreerence beacon slot position in other words, so beacon slot position control unit 205 countdowns move counter 206 (step S608) in the wings.Then, beacon slot position control unit 205 is 0 the moment (step S609) in count value, to the moving of the beacon slot that is positioned at the forefront that is considered to be idle time slot, in sending the timer function of indicating member 208, beacon sets beacon delivery time (step S610) for own.
As mentioned above, beacon slot position control unit 205 exists under the situation of idle time slot than oneself also upper part, when the next part is not planned other mobile radio communication device, beacon slot position time slot is forwards moved, therefore, beacon period can be shortened (being called " reduction action ").Thus, beacon period is adjusted to the length that does not have waste according to the number that joins the radio communication device in the Radio Network System.
In addition, from the change of the time slot position of time slot forwards of this rear time slot, after beacon slot position control unit 205 is determined change, carry out after 3 cycles at superframe.Thus, beacon slot position control unit 205 can occupy information according to beacon period and hold the beacon slot position that is in away from the radio communication device of 1 jumping position.Therefore, beacon slot position control unit 205 also moves oneself beacon slot position idle time slot forwards when avoiding this time slot position, thus can avoid with away from 1 the conflicting of time slot position of jumping the radio communication device of position.
In addition, in the present embodiment, the reset values of having supposed mobile counter is 3, but is not limited thereto, so long as more than 2, just can obtain same effect.But consider also not have in beacon detects, to have moved to 1 situation of jumping in the zone at 1 radio communication device of jumping in the zone, preferred more than 3.
In addition, determine to handle, be in the radio communication device of the such position relation of Figure 16 and also can detect initiate radio communication device by the beacon slot position of carrying out in step S506, illustrating.
In Figure 16, radio communication device A (1601) can intercom mutually with the radio communication device B (1602) in the communication zone 1611, radio communication device B (1602) can intercom mutually with radio communication device A (1601) and the radio communication device C (1603) in the communication zone 1612, and radio communication device C (1603) can intercom mutually with radio communication device B (1602) and the radio communication device D to M (1604) in the communication zone 1613.In addition, radio communication device A to M is at the 1st time slot to the 12 time slots transmission beacon separately.In addition, Figure 17 A, B have shown the user mode of each time slot of radio communication device.
In Figure 17 A, time slot 1701 expression radio communication device A send the beacon of oneself at this time slot position, time slot 1702 expression radio communication device A receive the beacon that is sent from radio communication device B at this time slot position, the time slot position reception that time slot 1703 is illustrated in radio communication device A occupies the beacon of information from beacon period radio communication device B, that comprise notice, and described notice is for having sent the notice of beacon from radio communication device C.In addition, the idle time slot of time slot 1704 expressions, the additional time slot (extra slot) of time slot 1705 expressions.In addition, these method for expressing also are same in Fig. 7-Figure 10, Figure 12-Figure 15, Figure 20-Figure 22, Figure 31 to Figure 41.In addition; so-called additional time slot; be meant: guarantee as the protection field of not carrying out data transmit-receive for the longest beacon slot of slot length in the beacon slot length information 305 of neighbour's radio communication device being added the time field that obtains after the entrant is with slot length, be attached to the time slot on oneself the beacon slot length.
Radio communication device A (1601) occupies information 302 according to the beacon sender information 301 from radio communication device B (1602) with beacon period, by the beacon of radio communication device B and radio communication device C, knows that the 2nd time slot and the 3rd time slot use.In addition, radio communication device B according to the beacon sender information 301 of radio communication device A and C and beacon period information 302, can know that also the 1st time slot and the 3rd time slot to the 12 time slots use.
At this moment, radio communication device A adds time slot with beacon period based on appended 9 time slots from the beacon slot length 305 of radio communication device B.Therefore, radio communication device A adds the entrant with 3 time slots of time slot, then treats accepting state for being in beacon to the 15th time slot.Therefore, the place of radio communication device X (1605) in the communication zone 1611,1612 of radio communication device A shown in Figure 16 and C, sent when being used for initiate beacon at the 14th time slot, shown in Figure 17 B, radio communication device A can receive this beacon.If radio communication device A will not be used for determining of beacon period from the beacon slot length 305 of radio communication device B, under the situation of not appending additional time slot, then be identified as beacon period until the 6th time slot, just do not receive beacon thereafter.Therefore, radio communication device A just can not detect initiate radio communication device X.
Like this,, determine beacon period, can detect the beacon of initiate radio communication device by beacon slot length with the beacon sender information according to radio communication device of the present invention.
Next, exist radio communication device A (101) with Fig. 7 A, B, C to Figure 10 A, B, C explanation to the situation of F (106) in position relation as shown in Figure 1, new radio communication device G (107) adds fashionable action.
The user mode of the beacon slot of each the radio communication device A (101) before Fig. 7 A is illustrated in radio communication device G (107) and adds to the F (106).
In Fig. 7 A, radio communication device A sends beacon As at the 1st beacon slot, radio communication device B sends beacon Bs at the 2nd beacon slot, radio communication device C sends beacon Cs at the 3rd beacon slot, radio communication device D sends beacon Ds at the 4th beacon slot, radio communication device E sends beacon Es at the 2nd beacon slot, and radio communication device F sends beacon Fs at the 5th beacon slot.
In addition, for example, the beacon of the radio communication device B～D of display radio communicator A in the communication zone of the 2nd～the 4th time slot reception oneself (Br～Dr).And, shown radio communication device A, according to beacon from radio communication device C, occupy the beacon of knowing among the information Eb at the 2nd time slot transmission time neighbour's radio communication device E in beacon period, according to beacon, occupy the beacon of knowing among the information Fb at the 5th time slot transmission time neighbour's radio communication device F in beacon period from radio communication device D.
In addition, radio communication device A guarantees that the 6th to the 8th time slot use time slot as the entrant, even also can receive when new radio communication device sends beacon.In addition, additional time slot is located among the radio communication device E.Radio communication device E and since the beacon slot length information be to the maximum by radio communication device C notified ' 7 ', so established 1 additional time slot.
Here, beacon period being occupied information is illustrated.Disperseing in the concurrent target Radio Network System of delivering letters of total beacon period with self-discipline, must distribute beacon slot to make and can not communicate at the radio communication device of identical beacon slot more than 2.But this can not judge it is the beacon slot of which radio communication device under the situation between the radio communication device of total identical beacon slot.Therefore, which has priority need to judge this beacon slot by the third party.Promptly, from neighbour's radio communication device beacon slot position at oneself, the beacon period that receives the device id that does not comprise oneself is occupied under the situation of information, and this beacon slot as the beacon slot that problem has taken place, need be arrived other beacon slot with relocation.Therefore, radio communication device is stored its beacon slot position with the beacon sender information when beacon receives, and occupies information as beacon period send always when the beacon of oneself sends.Thus, each radio communication device can obtain to receive inferior neighbour's the information of radio communication device of the radio communication device of beacon.
Next, the initiate situation of Fig. 7 B display radio communicator G.
In Fig. 7 B, radio communication device G knows the time slot state that is presented on the radio communication device G (717) according to the beacon that radio communication device A, B in communication zone and D receive.And radio communication device G is because new the adding, selects one of any beacon that sends from the entrant with time slot.In this example, to make the entrant be 3 with time slot but not specific to this, also can be variable-length.Under the situation of variable-length, can in the beacon period length 305 of beacon sender information 301, comprise the entrant and also send with slot length.In addition, in the present embodiment, radio communication device G adds at the 8th time slot.At this moment, radio communication device A, B, D, G have changed owing to being judged as beacon infrastructure, so carry out the retrieval of the place ahead time slot.But the radio communication device beyond the radio communication device G can not detect idle time slot in the time slot forwardly.Therefore, only radio communication device G sends and to make counter 304 be ' 3 ' beacon.Radio communication device A, B, D receive this beacon, and the counter 304 that detects radio communication device G is ' 3 '.
Fig. 7 C is the figure that shows the user mode of next beacon period.
In Fig. 7 C, radio communication device C and F occupy information 302 by the beacon period of radio communication device A and D transmission radio communication device G respectively.At this moment counter 307 is the Counter Values that receive in radio communication device A and D cycle in front, and institute thinks ' 3 '.
On the other hand, radio communication device G carries out the mobile processing of time slot position, does not decide Counter Value ' 2 ' the concurrent mark of delivering letters in counter 304.Radio communication device A, B, D, the counter 304 that receives beacon sender information 301 from radio communication device G are ' 2 ' beacon.
In addition, radio communication device E, the content of the beacon sender information 301 that radio communication device C is directly received was documented in from the beacon period that radio communication device C receives occupies the information 302, is contained among the information that receives and will not occupy information 302 as beacon period.Therefore, radio communication device E can not know the existence of radio communication device G.But radio communication device E is owing to the beacon slot length 305 of the beacon sender information 301 that receives from radio communication device C is ' 8 ', and institute is so that the additional hours crack is ' 4 '.
Fig. 8 A is the figure of user mode of mobile counter 206 beacon period for ' 0 ' time of display radio communicator G.
In Fig. 8 A, the beacon period of radio communication device G moves to the 6th beacon slot.
Then, the entrant of radio communication device A, the B as shown in Fig. 8 B, D, G is the 7th～the 9th time slot with time slot in next superframe.
Next the action of the beacon communication when radio communication device B withdraws from, is described after radio communication device G adds.In addition, establishing and detecting radio communication device is not the neighbour, carries out when certain number of times can not receive beacon continuously.
At first, radio communication device B is not when the neighbour, and shown in Fig. 9 A, radio communication device A, D, G are owing to the beacon that does not receive from radio communication device B, so they recognize that side by side variation has taken place beacon infrastructure.And radio communication device C, F such as Fig. 9 B are shown in the disappearance that next superframe is known radio communication device B.Radio communication device F, G are because the 2nd beacon slot is not shared by radio communication device E, so judge that there is idle time slot in time slot forwardly.Thus, the mobile counter 206 separately of radio communication device F, G is set to ' 3 '.But, owing to have the right of mobile time slot, only be the radio communication device G that in the end square time slot sends beacon, so the counter that has only radio communication device G is by countdown (Fig. 9 C).
After the countdown, the radio communication device G shown in Figure 10 A moves to the 2nd time slot.Thus, radio communication device A, D detect the variation of beacon infrastructure at once once more, upgrade beacon period until the 8th time slot.In addition, also shown in Figure 10 B, the time slot that detects radio communication device G in next superframe moves for radio communication device C, F, upgrades beacon period until the 8th time slot.Thus, radio communication device F is back to ' 0 ' with mobile counter.
Then, in next superframe shown in Figure 10 C, radio communication device E receives the beacon slot length 305 from radio communication device C, upgrades beacon period until the 8th time slot.
As mentioned above, in the cordless communication network of present embodiment, because radio communication device suitably carries out the reduction action of beacon period when new adding or disappearance, each radio communication device can realize that communication efficiency is good, the radio communication of power consumption less wastage.
In addition, have the situation that exists plural radio communication device to select identical entrant's usefulness time slot simultaneously.In this case, the radio communication device of conflict can attempt adding once more Radio Network System.At this moment, each radio communication device of conflict carries out for example randomization by the superframe number of times that back off algorithm (back off algorithm) makes the entrant use again, and reduces the probability of conflict again.
Next, in beacon group, existing under the situation of the radio communication device that moves, illustrate how to intercom mutually with other radio communication device.
Figure 11 is the mutual allocation plan of radio communication device that moves.
In this allocation plan, radio communication device B～G (1102) can intercom mutually.And radio communication device B～G (1102) also can communicate by letter with the radio communication device H (1103) in communication zone 1112.Radio communication device H (1103) can also communicate by letter with the radio communication device (1104) in the communication zone 1113, and radio communication device (1104) also can be communicated by letter with the radio communication device J～L (1105) that can intercom mutually in the communication zone 1114.Like this, radio communication device B～beacon group of L shaped one-tenth, the sending method of the beacon when moving with suitable speed on this beacon group next door with Figure 12 A, B to Figure 15 A, B explanation radio communication device A (1101) below.
At first, during the place 1121 of radio communication device A (1101) in the communication zone that moves to radio communication device B to G (1102), the beacon around the scanning sends to own beacon one of entrant's usefulness time slot of beacon period.
Figure 12 A is the figure that shows the time slot user mode of each radio communication device at this moment.
In Figure 12 A, display radio communicator A (1101) sends the beacon of oneself with one of time slot (the 10th time slot) its entrant.In addition, display radio communicator B to I sends beacon at the 1st time slot to the 8 time slots respectively, and radio communication device J to L sends beacon at the 1st time slot to the 3 time slots respectively.
Next, radio communication device A (1101) is because at the 3rd time slot transmission beacon of entrant with time slot, so the reduction action is counted and moved on to mobile counter 206.Therefore, shown in Figure 12 B, the beacon slot of radio communication device A moves to the 8th time slot, has carried out the cripetura of beacon period.At this moment, radio communication device H is by occupying information from the beacon period of radio communication device B to G (1102), know the existence of the beacon of radio communication device A in the 8th time slot, but because outside communication zone, so can not become the obstacle of communicating by letter with radio communication device I.
Next, radio communication device A as shown in FIG. 13A, will send the situation of beacon at radio communication device H by radio communication device A and radio communication device I simultaneously when move in the place 1122 of the communication zone of radio communication device H at the 8th time slot (1301).
Radio communication device II is owing to be positioned at border with the communication zone of radio communication device A, so the beacon of radio communication device I receives easily.Therefore, radio communication device H occupies in the information 302 notice radio communication device I in beacon period and is using the 8th time slot.The entrant that the radio communication device A that has received this notice selects to be used to obtain new beacon slot uses time slot.As a result, shown in Figure 13 B, radio communication device A obtains the 9th time slot (1302) with one of time slot as the entrant, and sends beacon at this.
And when radio communication device A moved in the place outside the communication zone of radio communication device B～G 1123, as shown in figure 14, radio communication device B～G (1102) can't directly receive and send messages with radio communication device A in the 9th time slot (1401,1402).
And, when radio communication device A moves in the place in the communication zone of radio communication device I (1104) 1124, then as shown in Figure 14B, radio communication device A occupies information through radio communication device I (1104) and radio communication device J～L (1105) transmitting-receiving beacon period.Thus, the 9th time slot (1403) of radio communication device J～L (1105) is recorded as radio communication device A and uses.In addition, the 1st time slot to the 3 time slots of radio communication device A are recorded as radio communication device J～L (1105) and use.
And, when radio communication device A moves in the place outside the communication zone of radio communication device H (1103) 1125, shown in Figure 15 A, just can not occupy information from the beacon period of radio communication device H reception radio communication device B～G (1102).Therefore, radio communication device A judges that the clear area has appearred in time slot 1501 forwardly, begins the countdown of mobile counter, through superframe 3 all after dates, beacon is moved to the 4th time slot 1501 shown in Figure 15 B.
Like this, even even certain radio communication device is between other radio communication device when mobile, owing to can carry out the reduction action of in good time beacon period, so at this state, can realize that also communication efficiency is good, the radio communication of the less wastage of power consumption.
In addition, in the present embodiment, the beacon sender information 301 and the beacon period of beacon frame are occupied information 302 and have counter respectively, and its Counter Value has shown the stage of the transmission position that whether is positioned at the change beacon.But, be not limited to this counter as the method for the change state of representing beacon position, also can service marking.That is, radio communication device is provided with sign when having the request of change present beacon slot position, is judged as when not needing to carry out the time slot position change or the mobile counter of countdown oneself and sign is set when changing the beacon slot position.And whether the Counter Value during determine to handle beacon slot position as shown in Figure 6 is 0 judgement, can be by judging that whether being provided with this indicates and realize.Thus, can be to form the required beacon frame of definite processing of beacon slot position than counter data volume still less.
(execution mode 2)
Figure 18 shows the definite flow chart of handling in radio communication beacon slot position in the 2nd execution mode of the present invention.In addition, the formation of radio communication device is identical with execution mode 1 in the present embodiment, and difference is determined to handle in the position of beacon slot position control unit 205.
The flow chart of processing is determined in the beacon slot position that the following describes radio communication device in the present embodiment of representing in Figure 18.
At first, beacon slot position control unit 205 is based on the beacon slot state table that is write down in the record cell 203, judges with the formation (beacon infrastructure) of last time beacon slot and compares whether change (step S1801).Under the situation that is not having to change, beacon slot position control unit 205 is converted to and is used for the time slot position time slot countdown action of moving forwards.That is, beacon slot position control unit 205 judges whether mobile counter 206 is 0, mobile counter 206 be 0 o'clock since forwardly time slot be not have idle state, so end process (step S1802).
On the other hand, not that the mobile counter 206 of subsequent judgement is Full, " Full-1 " or other (step S1803) under 0 the situation at mobile counter 206.And, under the situation that is Full, judge that kind 404 is beacons, user mode 403 is that time slot or the kind 404 of Full is BPOIE, user mode 403 is whether the time slot of Full is positioned at than oneself more rear (step S1804).Then, when having corresponding time slot, beacon slot position control unit 205 is made as mobile counter 206 Full and keeps (step S1805) as what have than the countdown that oneself preferentially begins the change of beacon slot position.Like this, be positioned at more by making that the radio communication device of the beacon slot position at rear has the mobile priority of beacon slot position, can prevent that a plurality of beacons from moving to same idle time slot simultaneously.
On the other hand, when in step S1804, not having corresponding time slot, beacon slot position control unit 205 judges whether mobile counter 206 is set at Full state (step S1806), mobile counter 206 successively decrease (step S1807) under the situation of Full state.Then, become at Counter Value under 0 the situation (step S1808), beacon slot position control unit 205 is in order to move to the idle time slot that is positioned at the forefront in next beacon period, the beacon delivery time is set in beacon sends in the timer function of indicating member 208 (step S1809).In addition, at Counter Value not 0 the next intactly end process of situation.
In addition, in step S1806, when beacon slot position control unit 205 is not Full at mobile counter 206, confirm whether notified the radio communication device with Counter Value identical (step S1810) with the Counter Value of oneself by BPOIE by the beacon slot state table.Then, under the situation that has such radio communication device, be transformed into step S1805 and make mobile counter 206 be back to Full.Under the situation that does not have such radio communication device,,, make mobile counter 206 countdowns so be transformed into step S1807 owing to this means oneself to have the right that move prepreerence beacon slot position.
This is owing to following reason.That is, other radio communication device A that detects by BPOIE is by continuous holding under the situation of countdown of the moment of its counter, with the Counter Value countdown of Counter Value also high 1 than oneself.So, when radio communication device A moves to desirable idle time slot,, detected behind 1 counting in the radio communication device of oneself by moving the time slot position that changes.Thus, in detection, can not detect idle time slot, therefore will produce the possibility of beacon slot conflict in the moment that oneself radio communication device moves by BPOIE.
In addition, in step S1803, mobile counter 206 is under the situation of Full-1, judges that kind 404 is beacons, and user mode 403 is whether the time slot of Full-1 is than oneself more rear (step S1811).Then, when having corresponding time slot, transfer to step S1805, pass when not having corresponding time slot and move on to S1806.In the Counter Value of " Full-1 ", the Counter Value by detected other wireless device of BPOIE A is Full, and this is identical with common reset mode.Still begin the state counted so can not differentiate reset mode.
In addition, in step S1803, mobile counter 206 is not neither Full is again under the situation of Full-1, judge that kind 404 is beacons, and whether the time slot that user mode 403 equates with the Counter Value N of mobile counter is than oneself rear more, perhaps, judge that kind 404 is BPOIE, and the time slot that equates with Counter Value " N+1 " of user mode 403 is whether than oneself more rear (step S1812).Then, when having corresponding time slot, be transferred to step S1805, when not having corresponding time slot, be transferred to step S1806.
In addition, in step S1801, under the vicissitudinous situation of beacon infrastructure, beacon slot position control unit 205, confirm whether time slot (the nearer time slot of distance beginning side) exists idle time slot (step S1813) forwardly, and making mobile counter 206 when not having idle time slot is 0 (step S1814).If idle time slot arranged then judge whether the Counter Value of mobile counter 206 is 0 (step 1815).Not under 0 the situation, to be transferred to step S1803 at Counter Value.Be that in idle time slot, the time slot of forefront is defined as mobile destination, and mobile counter 206 is set at Full (step S1816) under 0 the situation at Counter Value.Thus, finish the preparation of moving of beacon slot.
As mentioned above, identical with execution mode 1, beacon slot position control unit 205 exists than oneself more under the situation of the idle time slot in the place ahead, during the radio communication device of not predetermined in the wings mobile other, can reduce beacon period.And, even be positioned at than oneself more the radio communication device of the time slot position at rear begin reduction action, oneself also begins countdown under certain conditions.Therefore, the radio communication device of predetermined mobile beacon time slot position can wait the mobile end of time slot position of other radio communication device just to begin the reduction action.At this moment, beacon slot position control unit 205 during 1 superframe, can not know which beacon time neighbour's radio communication device has moved to.But the radio communication device that is positioned at time neighbour detects mobile counter with the beacon slot position only increases by 1 when counting, and beacon slot position control unit 205 makes the mobile counter reset of oneself to Full.Thus, can prevent the conflict of moving to same time slot.
Next, the reduction action of beacon period when radio communication device of the present invention exists in the configuration shown in Figure 19 is described.
In Figure 19, radio communication device A (1901) can intercom mutually with the radio communication device D (1904) in the communication zone 1911, radio communication device B (1902) can intercom mutually with radio communication device D (1904) and the radio communication device E (1905) in the communication zone 1912, radio communication device C (1903) can intercom mutually with the radio communication device E (1905) in the communication zone 1913, radio communication device D (1904) can intercom mutually with radio communication device A (1901) and the radio communication device B (1902) in the communication zone 1914, and radio communication device E (1905) can intercom mutually with radio communication device B (1902) and the radio communication device C (1903) in the communication zone 1915.
Shown that in Figure 20 to Figure 22 radio communication device A to E at this moment sends the sequential of beacon and the beacon message of each time slot that each radio communication device detects in beacon period.The Full of the mobile counter in the reduction action shown in addition, having shown here is ' 3 ' situation.
In Figure 20 A, radio communication device A to E sends beacon at the 4th to the 7th time slot.In addition, the beacon message that is in the radio communication device of the position relation that distance 1 jumps occupies in the information in beacon period and detects.Then, whole radio communication devices detects and more has idle time slot in the place ahead than oneself, as the beacon slot of preparing to move to idle time slot, sets Full (in the present embodiment, being ' 3 ') at mobile counter separately.
In ensuing super frame period, shown in Figure 20 B, radio communication device A and C are owing to be positioned at rear time slot (the 7th time slot), so begin successively decreasing of mobile counter.In addition, radio communication device B is than oneself time slot more in the time slot at rear, and detecting the transmission source is that radio communication device A, C, mobile counter all are ' 0 ' BPOIE.Therefore, radio communication device B also carries out successively decreasing less of mobile counter.Other radio communication device D, E, owing to detect mobile counter and oneself be all the radio communication device of Full at the time slot than own rear, so do not carry out successively decreasing of mobile counter.
In ensuing super frame period, shown in Figure 20 C, radio communication device A, C continue successively decreasing of mobile counter.In addition, radio communication device B, own is Full-1 to Counter Value, and than oneself time slot at rear more, only detects the BPOIE that the transmission source is radio communication device A, C.Like this, radio communication device B continues successively decreasing of mobile counter.And radio communication device D detects the time slot that the transmission source is radio communication device A than oneself time slot at rear more, but because mobile counter is littler than the Counter Value of oneself, so carry out the successively decreasing of mobile counter of oneself.
In ensuing super frame period, shown in Figure 21 A, radio communication device A, C continue the result of the minimizing of mobile counter, and counter becomes ' 0 ', so, the beacon slot position is moved to the 1st time slot as the idle time slot that is positioned at the forefront respectively.Radio communication device B the 7th time slot in the wings detects the BPOIE of radio communication device A, C.But these mobile counter all is ' 1 ', is mobile counter+1 of oneself, so mobile counter is turned back to Full.On the other hand, radio communication device D detects time slot in the wings, and the transmission source is radio communication device B, and Counter Value is the time slot of Full, but since unequal with the Counter Value of oneself, so continue countdown.
In ensuing super frame period, shown in Figure 21 B, radio communication device D continues the result who successively decreases of mobile counter, and counting becomes ' 0 ', so 2nd time slot of beacon slot position to the idle time slot that is positioned at the forefront moved.Radio communication device B continues successively decreasing of mobile counter.
In ensuing super frame period, shown in Figure 21 C, radio communication device B continues successively decreasing of mobile counter.Radio communication device E, owing to be not Full at the Counter Value of the radio communication device B that sends than the time slot at own rear, so begin successively decreasing of mobile counter.
In ensuing super frame period, shown in Figure 22 A, radio communication device B continues the result who successively decreases of mobile counter, and counting becomes ' 0 ', so 3rd time slot of beacon slot position to the idle time slot of forefront moved.Radio communication device E continues successively decreasing of mobile counter.
In ensuing super frame period, shown in Figure 22 B, radio communication device E changes aspect beacon infrastructure, detects not had idle time slot than oneself more upper place, so the mobile counter of radio communication device E is set to ' 0 '.
As mentioned above, in the end radio communication device A, the C of square time slot are after the idle time slot of forefront moves, in the communication zone of radio communication device A and the radio communication device D of square time slot position in the end not, the idle time slot to the forefront behind 1 superframe moves.Afterwards, move at radio communication device B idle time slot to the forefront behind 2 superframes position that distance wireless communication device A, C1 jump, that be positioned at rear time slot.
Like this, exist forwardly under the situation of a plurality of idle time slots, radio communication device, can be successively to the idle time slot mobile beacon time slot position of forefront, till not having idle time slot.Thus, and compare, can carry out the reduction action of beacon period at short notice in the method shown in the execution mode 1.
In addition, in the present embodiment, the reset values that makes mobile counter is ' 3 ', but is not limited thereto, so long as then can obtain same effect in principle more than ' 2 '.But, consider also situation about having moved in the not detection of radio communication device in 1 jumps in 1 jumping at beacon, be preferably more than ' 3 '.
(execution mode 3)
The formation of radio communication device is identical with execution mode 1 in the present embodiment, and as shown in figure 27, difference is: appended mobile premise equipment ID (405) in the beacon slot state table that is write down in memory cell 203.Move the device id that has write down the radio communication device that the corresponding time slot of pre-orientation moves among the premise equipment ID405 at this.The beacon frame that radio communication device receives by the radio communication device from other can be learnt and move predetermined radio communication device.
Figure 28 is the pie graph of the beacon frame in the present embodiment 3.
In Figure 28, mobile destination beacon slot sequence number 2201 fields, it is the mobile destination time slot sequence number that moves of the predetermined beacon slot of radio communication device in transmission source, mobile destination beacon slot sequence number 2202 fields are that the radio communication device in transmission source is detected, the mobile destination time slot sequence number of predetermined other radio communication device that moves.Additional this point of these fields, different with execution mode 1.In addition, this to move destination beacon slot sequence number 2201,2202 fields be additional under 0 the situation at mobile counter.
Frame identifying unit 202, be not under ' 0 ' the situation at received beacon frame, counter 304,307, read the time slot sequence number that is recorded in the mobile destination beacon slot sequence number 2201,2202, recording equipment ID303,306 in the hurdle of the mobile premise equipment ID405 of its corresponding, beacon slot state table.Thus, beacon slot position control unit 205 can detect other radio communication device and the beacon slot position to which time slot position will be moved.
In addition, it is identical with execution mode 1 that frame constitutes unit 207, based on the beacon slot state table of being read from record cell 203 with from the information of beacon position control unit 205, generating beacon period occupies information or beacon sender information 301, constitutes the beacon frame that comprises management information.And frame constitutes unit 207, predetermined own or detected other the timeslot number that moves of radio communication device is set in the mobile purpose time slot sequence number 2201,2202 of beacon frame.
Figure 23 is the definite flow chart of handling in beacon slot position that shows radio communication device in the present embodiment.
At first, the beacon slot state table that beacon slot position control unit 205 is write down based on record cell 203 confirms whether the formation (beacon infrastructure) of beacon slot last time exists variation (step S2301).In addition, under the different situation of mobile predetermined time slot ID, also carry out as having taken place at beacon infrastructure to change.Then, under the situation that beacon infrastructure exist to change, beacon slot position control unit 205 confirms whether time slot forwardly (from the forefront nearer time slot) has idle time slot (step S2302).When not having idle time slot, it is 0 and end process (step S2303) that beacon slot position control unit 205 makes mobile counter 206.
On the other hand, exist under the situation of idle time slot, the radio communication device of other whether beacon slot position control unit 205 inspection exists that pre-orientation should the free time time slot moves, under the situation that exists, also check the time slot position (step S2304) that in this radio communication device, oneself whether is positioned at now rear.Under the situation of the time slot position that oneself is positioned at rear, beacon slot position control unit 205 checks whether the Counter Value of mobile counter 206 is ' 0 ' (step S2305), be under ' 0 ' the situation, in order to begin mobile counter 206 to be set to Full (being ' 3 ' in the present embodiment) (step S2306) to the moving of this free time time slot.
On the other hand, not under ' 0 ' the situation at the Counter Value of mobile counter 206, beacon slot position control unit 205, successively decreasing, this moves counter 206 (step S2307).Then, it at Counter Value moment (step S2308) of 0, beacon slot position control unit 205 in order to move to the beacon slot that is regarded as idle forefront, is set to the beacon delivery time in the timer function that beacon sends indicating member 208 (step S2309).
In addition, in step S2304, under the situation of the own not now time slot position that is positioned at rear, beacon slot position control unit 205 is selected to next idle time slot (step S2310) that moves the destination.As this free time time slot, next select is the idle time slot in the place ahead.But, not having to be transferred to step S2303 under the situation of corresponding idle time slot, beacon slot position control unit 205 makes mobile counter 206 be " 0 " and end process.On the other hand, exist under the situation of idle time slot, beacon slot position control unit 205 makes counter reset to Full, with the hurdle of the new mobile destination time slot position corresponding mobile premise equipment ID405 of beacon slot state table in the device id (step S2306) of record oneself.
In addition, do not have in the position of last time beacon slot under the situation of change, promptly, under the situation that beacon infrastructure does not have to change in step S2301, beacon slot position control unit 205 judges whether mobile counter 206 is " 0 " (step S2311), mobile counter 206 during for " 0 " since forwardly time slot be not have idle state, so end process.
On the other hand, under mobile counter 206 is situation more than " 1 ", with reference to the beacon slot state table, whether the radio communication device of checking other has selected the time slot of own selection, then, radio communication device at other has under the situation of the time slot of oneself selecting, and also checks the time slot position (step S2312) that oneself whether is positioned at now rear in this radio communication device.Not in the end under the situation of time slot position of side, be transferred to step S2306 at oneself, mobile counter 206 is reset to Full and end process.
On the other hand, at oneself in the end under the situation of time slot position of side, beacon slot position control unit 205 is because own for having the right that moves prepreerence beacon slot position, so be transferred to step S2307, the countdown processing that is used to move.
As mentioned above, beacon slot position control unit 205, exist than oneself more under the situation of the idle time slot in the place ahead, even there is predetermined other the radio communication device that moves to the rear, need not wait for the time slot position mobile end of the radio communication device at this rear, just begin to be positioned at the shift action of the idle time slot in the place ahead to next.Therefore, radio communication device with than oneself more the time slot position of the radio communication device at rear move parallelly, can carry out the time slot position of oneself and move processing.Thus, exist under the situation of a plurality of idle time slots, can carry out the reduction action of beacon period the short time.
In addition, in the present embodiment,, determining that superframe carried out after 3 cycles after changing from the change of the time slot position of time slot forwards of this rear time slot.Thus, beacon slot position control unit 205 occupies information from beacon period and grasps and to be positioned at the beacon slot position that distance 1 is jumped the radio communication device of position.Therefore, beacon slot position control unit 205 can be avoided this position while idle time slot forwards and move the beacon slot position of oneself, and the time slot position that can avoid the radio communication device of the position of jumping with distance 1 conflicts.
In addition, in the present embodiment, the count value of establishing mobile counter is 3, but is not limited to this, so long as more than 2, can obtain identical effect in principle.But considering also has situation about moving in the not detection of radio communication device at beacon in 1 jumps in 1 jumping, is preferably more than 3.
Next, reduction action when radio communication device A of the present invention, B, C, D in the relation of the position that can intercom mutually forms beacon period shown in Figure 24 A is described.
In Figure 24 A, radio communication device A to D sends beacon respectively in the 1st time slot, the 4th time slot, the 6th time slot, the 8th time slot.The mobile counter of each radio communication device at this moment is respectively 0, Full (being ' 3 ' in the present embodiment), Full, Full, and the mobile destination time slot position of radio communication device B, C, D is indication the 2nd time slots all.This shown radio communication device B, C, D since than own beacon slot more the time slot in the place ahead have idle time slot, so simultaneously all in advance the 2nd time slot of directed idle time slot move.
Next, in Figure 24 B,, be judged as move override, carry out the countdown of mobile counter because radio communication device D is positioned at last side's time slot position in the predetermined radio communication device that moves.Radio communication device B, C detect not the time slot position of side in the end, carry out moving the destination time slot alternation of signs to conduct at the 3rd time slot of the idle time slot in next the place ahead.
Next, in Figure 24 C, radio communication device C, D judge the time slot position that is positioned at last side in the radio communication device that pre-directed mobile destination time slot position moves, countdown mobile counter separately.Radio communication device B does not just change mobile destination sequence number owing to there is not the idle time slot in next the place ahead, does not carry out the countdown of mobile counter yet.
Next, in Figure 24 D, radio communication device D, the count value of mobile counter is 0, to the 2nd time slot mobile beacon launching position as mobile destination time slot.Then, the count value of mobile counter is set is 0 to radio communication device D.Radio communication device C countdown moves counter.
Next, in Figure 24 E, radio communication device C, the count value of mobile counter is 0, to the 3rd crack mobile beacon launching position as mobile destination time slot.Then, to establish the count value of mobile counter be 0 to radio communication device C.Radio communication device B is not because time slot forwardly has idle time slot, so mobile counter is set to 0 yet.
Like this, radio communication device C before the time slot position mobile end that is positioned at than the radio communication device D of the beacon slot position at own rear, begins to be used for the counting action of moving to the 3rd time slot that is the idle time slot in next the place ahead.Therefore, to as the moving of the 2nd time slot of idle time slot and the 3rd time slot, and compare, can finish at short notice in the method shown in the execution mode 1.In addition, in the present embodiment, the selection of idle time slot in step S2310, except the time slot that more radio communication device at rear is scheduled to move than oneself, select to be positioned at the idle time slot of forefront, but be not limited thereto, also can select idle arbitrarily time slot.Thus, increase, move back so when beacon period becomes the situation etc. of sizable number, can contract rapidly owing to compare the number that reduces action side by side with the situation of selecting to be positioned at the forefront.
According to such the present invention, when having a plurality of idle time slot, because the moving of the beacon position of carrying out a plurality of radio communication devices of can walking abreast, so can carry out the reduction action of beacon period in the short time.
(execution mode 4)
Present embodiment, the method that the communication that produces when showing elimination group vicinity of a plurality of beacon periods is interfered.
Figure 25 is the wireless communication system of present embodiment 4, and mobile network 2501,2502,2503 forms different separately beacon period groups.
In Figure 25, radio communication device A, L, X belong to different beacon period group 1,2,3 respectively.At this moment, these radio communication devices move to close position, and when the communication zone of the radio communication device that enters other, radio communication device A, L, X produce with other beacon period group in the beacon of the group of oneself or Data Receiving and interfere.
Figure 26 A is radio communication device A, L, the X of Figure 25 example of beacon period of constituting.When each group is received and dispatched without any strategy, 3 beacon period group data send and may intersect in the field, so just organize and interfere with other beacon period.Therefore, shown in Figure 26 B, should organize the time band that can preferentially use in advance beacon period by each superframe, be defined as from oneself belong to beacon period group the position at first of beacon period (A) to the next one of this radio communication device beacon period (B) that can receive.Thus, can prevent interference between beacon period group.But, as beacon period group 2 and beacon period group 3 relation, the beacon period group of the formation beacon period (B) that the beacon period group of formation beacon period (C) is afterwards gone ahead of the rest absorbs if the data transmit-receive that can not obtain minimum before next beacon period (C) arrives during the time, then reduces action.Thus,, also can guarantee the data transmitting time that minimum needs, then, can not encroach on mutual data transmitting time even most beacon period group mixing exists.
Figure 30 shows the figure of the formation of the beacon frame of each radio communication device transmission in the present embodiment.
In Figure 30, beacon sends information 301, also will be in conjunction with sign 3011, and beacon period begins skew (BPST skew) 3012 and beacon period is selected in (BP selection) 3013 beacon sender information that have been included in the execution mode 1.This shows the own combination action of itself carrying out beacon period that sends beacon in conjunction with sign 3011.In addition, BPST skew 3013 demonstrations begin the shift time that beacon period begins.In addition, BP selects 3013 to discern the skew side that makes the other side move to the skew side of oneself or moved to the other side beacon period.
Beacon period is occupied information 302, for the beacon period in execution mode 1 is occupied and also further comprised in the information in conjunction with sign 3014 and EBP sign 3024.Radio communication device occupies the EBP sign 3023 in conjunction with sign 3011, EBP information 3002 of the own beacon sender information 301 that is received of record in the information 302 in beacon period, and is notified to other radio communication device.
In conjunction with beginning announcement information 3001, comprise and merge counter (merge counter) 3015, shift counter (shift counter) 3016, move group 3017 and BPST skew 3018.Merge counter 3015 and show to beginning this superframe frequency in conjunction with action, be for two beacon periods of obtaining the object that becomes combination between each radio communication device in the group synchronously.Shift counter 3016, the radio communication device in the group in demonstration counting mobile beacon cycle is in the value of the counter of the super frame period that moves of its radio communication device of mobile laggard Xingqi of the initial radio communication device of beginning.Move group 3017 and show whether what send these beacons self is the beacon period group in mobile beacon cycle, be move beacon period group situation under sign is set.BPST skew 3018 is identical with the BPST skew of beacon sender information 301.
Extended beacon cycle information (EBP information) 3002 comprises device id 3019, Counter Value 3020, combination sign 3021, beacon slot position 3022, reaches EBP sign 3023.In device id 3019, the device id of record oneself under the situation in the mobile beacon of the radio communication device cycle that sends this beacon own, finish under the situation of running the beginning announcement information jointly the device id of the radio communication device in record transmission source in the radio communication device reception of state of emergency time slot (emergence slot) from other.About counter 3020, in conjunction with sign 3021, beacon slot position 3022, and EBP sign 3023 too record own itself or from the received content of other radio communication device.EBP indicate 3023 display device ID3019, counter 3020, in conjunction with sign 3021, and the information of beacon slot position 3022 are extended beacon gap informations.
The following describes different beacon periods is organized the action that is combined into.
At first, combination algorithm is carried out simple explanation.In addition, in this explanation, suppose in beacon period group 1 (BG-1) in conjunction with beacon period group 2 (BG-2).
The radio communication device X of the combination of step 1. request BG-2 transmission in the own beacon slot of the state of emergency time slot of BG-1 and BG-2 combines and begins announcement information.So-called state of emergency time slot is the special time slot of guaranteeing in emergency situations such as not having idle time slot.
The radio communication device X neighbour's of step 2. and BG-1 and BG-2 radio communication device, when receiving, carry out synchronously and send combining of also receiving in the own beacon that sends afterwards beginning announcement information with the merging counter in the source of transmission in conjunction with the beginning announcement information.Then, by sending the countdown that all merges counter in conjunction with the group of beginning announcement information.
In the beacon sender information of oneself, being provided with in the radio communication device of step 3. transmission BG-2, with desired combination in conjunction with the beginning announcement information in conjunction with the concurrent mark of delivering letters of sign.
Step 4. sends the radio communication device in conjunction with the beginning announcement information of BG-1 and BG-2, search for mutual the other side's beacon period and read in beacon, and occupy the EBP information (extended beacon cycle information) of information and adjacency information is notified to time neighbour's node (radio communication device of BG-1 is only made to setting up the EBP information in conjunction with the radio communication device of sign of BG-2) from the beacon time that this beacon becomes the radio communication device of the other side group.
Step 5. with after each radio communication device of BG-2 is being seen EBP information, detect under the situation that has the radio communication device that occupies identical beacon slot oneself inferior neighbour, becomes the beacon period that 0 before again join own under in group merging counter at BG-1.
Each radio communication device of step 6.BG-1 and BG-2 becomes at 0 o'clock at the merging counter, and shift counter is increased progressively counting, occupies until beacon sender information, beacon time till the state disappearance that is set up in conjunction with sign of information, EBP information.The super frame period of this shift counter counting before the mobile beacon time slot.
The radio communication device that step 7. is provided with in the beacon sender information of BG-2 in conjunction with sign increases progressively counting to shift counter.In addition, the radio communication device that sends beacon at the N beacon slot moves to the idle beacon slot that is positioned at the forefront of BG-1 during for 2N-1 at shift counter.
Step 8. is being provided with beacon sender information, beacon time when occupying disappearing in conjunction with the state that indicates of information and EBP information, and radio communication device finishes the transmission of combination beginning announcement information.
Step 9. radio communication device stops to contract of above-mentioned beacon period and moves back algorithm during sending in conjunction with the beginning announcement information.
Below with the above algorithm of description of drawings.
Figure 29 shows that two beacon periods groups is at the state of neighbor positions.
In Figure 29, radio communication device A, B, C, D, E form the 1st beacon period group, and radio communication device X, Y, Z form the 2nd beacon period group.
In the 1st beacon period group, radio communication device B (2902) can intercom mutually with radio communication device A (2901), C (2903), the E (2905) in the communication zone 2912, radio communication device D (2904) can not direct communication in inferior neighbour's position relation.In addition, radio communication device D (2904) is positioned at the communication zone 2913 of radio communication device C (2903), and with radio communication device B (2902) be time neighbour's position relation.
In the 2nd beacon period group, radio communication device X (2906), Y (2907), Z (2908) are positioned at mutual communication zone, can intercom mutually.
Next illustrated when group moved to as shown in figure 29 position and concern aforesaid 2 beacon periods that the combination of the 2nd beacon period group when group combines with the 1st beacon period moved.In addition, the position of 2 beacon periods relation is as follows.Promptly, the radio communication device X that the 2nd beacon period was organized, be positioned at radio communication device A, the B of the 1st beacon period group, the communication zone of C, D, the radio communication device Y that the 2nd beacon period was organized, be positioned at radio communication device A, the B of the 1st beacon period group, the communication zone of C, E, the radio communication device Z that the 2nd beacon period was organized is positioned at radio communication device B, the C of the 1st beacon period group, the communication zone of D, E.
Figure 31 to Figure 41 display radio communicator A to E, and radio communication device X to Z send the moment of beacon and the beacon message that each radio communication device is detected in beacon period at each time slot.
At first, Figure 31 shows that two groups move to the initial condition of present position.
In Figure 31, the radio communication device A that the 1st beacon period was organized, send beacon at the 4th time slot, radio communication device B sends beacon at the 2nd time slot, radio communication device C, send beacon at the 3rd time slot, radio communication device D sends beacon at the 4th time slot, radio communication device E sends beacon at the 5th time slot.Send beacon at the 4th slotted radio communicator A, D, but in the 1st beacon period group, 2 jumpings because radio communication device A, D are separated by are learnt that it exists so radio communication device B, C occupy information (BPOIE) by beacon period, and the interference of communication are taken place.
In addition, the radio communication device X that the 2nd beacon period was organized sends beacon at the 2nd time slot, and radio communication device Y sends beacon at the 3rd time slot, and radio communication device Z sends beacon at the 4th time slot.
In addition, the 1st time slot is a state of emergency time slot, is in idle condition.In addition, be not provided with in each beacon at this moment, do not comprise in conjunction with beginning announcement information 3001 and EBP information 3002 in conjunction with sign 3011,3014.
Next, with Figure 32 illustrate radio communication device X send notice in conjunction with the beginning of action in conjunction with start information the time state.
In Figure 32, radio communication device X finishes the beacon of running beginning announcement information 3001 and EBP information 3002 jointly in the state of emergency time slot (the 1st time slot) 3201 and the beacon slot of oneself the 3202 transmission records of the 1st beacon period group.At this moment be provided with ' 5 ' in the merging counter 3015, in shift counter 3016, be provided with ' 0 ' in conjunction with beginning announcement information 3001.And, in the mobile counter 3017, expression be set be own move beacon period group sign, the BPST that duplicates beacon sender information 301 described later in BPST skew 3018 is offset.
In addition, in the device id 3019 of EBP information 3002, counter 3020, beacon slot position 3022, putting down in writing Counter Value, the beacon slot position of the device id of radio communication device X itself, mobile counter respectively, be provided with in conjunction with sign 3021 and EBP sign 3023.And, be provided with the combination sign 3011 of beacon sender information 301, in BPST skew 3012, putting down in writing shift time the time started of organizing as the 1st beacon period of mobile destination beacon period.In addition, selecting to be provided with in 3013 expression at BP is the sign of benchmark with time started beacon period of mobile purpose.
The beacon of the direct receiving system X of radio communication device A to D of the 1st beacon period group learns that the action that combines with the beacon period of oneself of group of the 2nd beacon period begins.But radio communication device E is not owing to receiving this beacon, so constantly can not know at this.In addition, radio communication device X receives beacon and interference mutually at the 4th time slot 3203 of the 1st beacon period group from radio communication device A, the D that is positioned at communication zone.But, in this case, suppose that radio communication device X can receive the communication from radio communication device A.
In addition, the radio communication device A to D that the 1st beacon period was organized selects 3013 can know that the beacon period of group the 2nd beacon period begins shift time from radio communication device X by BPST skew 3012 with BP.Therefore, radio communication device A to D begins to receive the beacon of the 2nd beacon period group.At this moment, radio communication device D, detecting the beacon period of being put down in writing from the received beacon 3203 of radio communication device X occupies the device id that does not have oneself in the information 302.Thus, radio communication device D can know radio communication device X owing to interfere the beacon of failing to receive oneself.Therefore, radio communication device D determines in next superframe the time slot position of oneself is moved with time slot to the entrant.
In addition, radio communication device Y, the Z of the 2nd beacon period group know the beginning of being notified by radio communication device X in conjunction with action.Then, under the situation of determining self also to carry out in conjunction with action, radio communication device Y, Z be in order to notify this point, own time slot position be provided with beacon sender information 301 in conjunction with indicating 3011, read in the beacon period of the 1st beacon period group, make the EBP information 3002 concurrent marks of delivering letters.Therefore, radio communication device A to C detects the combination sign that radio communication device Y is set.But at this moment, radio communication device D beacon period occupy detected radio communication device Y in the information in conjunction with sign, so owing to be that the state of previous superframe is not set up.About radio communication transposition Z also is same, radio communication device B to D detects the combination sign that is provided with radio communication device Z, and radio communication device A beacon period occupy detected radio communication device Z in the information in conjunction with sign, so owing to be that the state of previous superframe is not set up.
In addition, receive and finish the radio communication device X radio communication device in addition of running beginning announcement information 3001 and EBP information 3002 jointly, duplicate received combination beginning announcement information 3001 and EBP information 3002, in the beacon slot transmission of oneself.Thus, the radio communication device beyond the radio communication device X can be passed on these information to the radio communication device that is positioned at time neighbour.
The state that in Figure 33, has shown next super frame period.
In Figure 33, the radio communication device X merging counter that successively decreases is provided with ' 4 ' merging counter 3015.Then, radio communication device X, the state of emergency time slot of organizing in the 1st beacon period (the 1st time slot) 3301 is put down in writing with beacon slot 3302 transmissions of oneself and is finished the beacon of running beginning announcement information 3001 and EBP information 3002 jointly.
Radio communication device E occupies the beacon from radio communication device X that information is known radio communication device B through communication zone, sent to the 1st time slot 3303 by beacon period.In addition, radio communication device E begins to receive the beacon of the 2nd beacon period group from know time started beacon period of the 2nd beacon period group in conjunction with the BPST skew 3018 of beginning announcement information.
Radio communication device D according to determined in the superframe formerly, moves to the entrant with the concurrent mark of delivering letters of time slot with the beacon slot position.Thus, for radio communication device X, the interference between radio communication device A and radio communication device D is eliminated.
In addition, after this super frame period, each radio communication device that the 1st beacon period was organized, the combination that detects radio communication device X, Y, Z indicates the state that all was set up before the mobile end of time slot position.
The state that in Figure 34, shows next super frame period.
In Figure 34, radio communication device X successively decreases and merges counter, is provided with ' 3 ' merging counter 3015.Then, radio communication device X sends record at the state of emergency time slot (the 1st time slot) 3301 of the 1st beacon period group and own beacon slot 3302 and finishes the beacon of running beginning announcement information 3001 and EBP information 3002 jointly.
In this super frame period, the Notification of Changes of the time slot position of radio communication device D is given other radio communication device A, B, X, the Y that is positioned at time neighbor positions.
The state that in Figure 35, has shown next 3 cycle of superframe.
In Figure 35, will the successively decrease Counter Value that merges counter of radio communication device X is arranged in the merging counter 3015 in conjunction with beginning announcement information 3001, at own beacon slot 3501 transmission beacons.This action is 2 to 0 at the Counter Value of the merging counter of radio communication device X and carries out repeatedly.During this, other radio communication device carries out for fear of the processing of the mobile grade of the time slot position of interfering so that the 2nd beacon period group organize to combine with the 1st beacon period and do not have obstacle.
The state that in Figure 36, has shown next super frame period.
In Figure 36, radio communication device A to E, radio communication device X to Z are ' 0 ' owing to merge counter, so begin to increase progressively the counting shift counter.Then, in shift counter 3016, Counter Value is set in conjunction with beginning announcement information 3001.At this moment, radio communication device A to E, radio communication device X to Z judge that the shift counter value be ' 1 ' (odd number), and the idle time slot (the 7th time slot) 3601 of the forefront that the beacon slot position was organized to the 1st beacon period moves.Then, send beacon at the 7th time slot position.Thus, the whole radio communication devices except radio communication device E receive this beacon, know that radio communication device X has changed time slot position.
The state that in Figure 37, shows next super frame period.
In Figure 37, radio communication device Y increases progressively shift counter, in the shift counter 3016 in conjunction with beginning announcement information 3001 Counter Value is set.At this moment, because the Counter Value of shift counter is ' 2 ' (even number), so radio communication device Y does not carry out moving of time slot position.In addition, occupy information 302, to the information of radio communication device D notice radio communication device Y in conjunction with sign 3011 through the beacon period of radio communication device C.Like this, by the superframe interval in 1 cycle is set, radio communication device Y is also notified to inferior neighbour's radio communication device in conjunction with action.
The state that in Figure 38, shows next super frame period.
In Figure 38, radio communication device Y increases progressively shift counter, in the shift counter 3016 in conjunction with beginning announcement information 3001 Counter Value is set.At this moment, radio communication device Y judges that the Counter Value of shift counter be ' 3 ' (odd number), and the idle time slot (the 8th time slot) 3801 of the forefront that the beacon slot position was organized to the 1st beacon period moves.Then, radio communication device Y sends beacon at the 8th time slot position.Thus, the whole radio communication devices except radio communication device D receive this beacon, know that radio communication device Y has changed time slot position.
The radio communication device Z that the 2nd beacon period was organized, because own time slot position in the forefront, so instead of wireless communicator Y is provided with the beacon of the Counter Value of shift counter in the beacon slot position of oneself is sent in shift counter 3016 in conjunction with beginning announcement information 3001.Whole radio communication devices except radio communication device A receive this beacon, know that radio communication device Z begins in conjunction with action.
The state that in Figure 39, shows next super frame period.
In Figure 39, radio communication device Z increases progressively shift counter, in the shift counter 3016 in conjunction with beginning announcement information 3001 Counter Value is set.At this moment, because the Counter Value of shift counter is ' 4 ' (even number), so radio communication device Z does not carry out moving of time slot position.In addition, occupy information 302, to the information of radio communication device A notice radio communication device Z in conjunction with sign 3011 through the beacon period of radio communication device B.Like this, also notify radio communication device Y in conjunction with action to inferior neighbour's radio communication device.
The state that in Figure 40, shows next super frame period.
In Figure 40, radio communication device Z increases progressively shift counter, in the shift counter 3016 in conjunction with beginning announcement information 3001 Counter Value is set.At this moment, radio communication device Z judges that the Counter Value of shift counter be ' 5 ' (odd number), and the idle time slot (the 9th time slot) 4001 of the forefront that the beacon slot position was organized to the 1st beacon period moves.Then, radio communication device Z sends beacon at the 9th time slot position.Thus, the whole radio communication devices except radio communication device A receive this beacon, know that radio communication device Z has changed time slot position.
The state that in Figure 41, shows next super frame period.
In Figure 41, radio communication device Z is owing to finished moving of time slot position, no longer additional combination beginning announcement information 3001.Other radio communication device knows that thus the combination action of the beacon period of the 2nd beacon period group finishes.
Like this, carry out the radio communication device of the combination of beacon period, be provided with the beacon sender information in conjunction with sign and at own beacon slot transmission beacon.Thus, can notify the beginning of beacon period to other radio communication device in conjunction with action.And, owing to the mobile of beacon slot position carried out every 1 cycle of superframe, so can be also in inferior neighbour's radio communication device notice combination.Thus, can prevent with the radio communication device generation time slot position that is positioned at time neighbor positions move conflict.
In addition, radio communication device X sends the superframe that merges counter from ' 5 ' to ' 3 ' in conjunction with beginning announcement information 3001.This is positively to notify for each radio communication device of organizing to the 1st beacon period group and the 2nd beacon period to combine start information, but is not limited to this.
As mentioned above, though since a plurality of beacon periods the moving and under the situation of interfering mutually, carry out combination action by the beacon period of beacon period between group that makes interference of group, can during distinguishing mutually, communicate, so can prevent interference.
Industrial application possibility
Wireless communications method and the radio communication device of the present invention when carrying out ad hoc communication and wait is useful , each radio communication device in wireless network sends under the situation of beacon, be applicable to dynamic change its The situation of beacon period.

Claims (22)

1. a wireless communications method is characterized in that, it is the wireless communications method that radio communication device does not send beacon with beacon period mutually with conflicting, and described method has following steps:
Radio communication device before as the beacon slot during the beacon that sends oneself, detects the step whether idle beacon slot is arranged in beacon period;
When described detection step detected idle beacon slot, the counting of superframe of beginning defined amount finished standby is before moved step from the beacon slot position of oneself to the beacon slot of described free time to the counting of the superframe of described defined amount;
To comprise and occupy information to the sender information of the mobile status information of the mobile treatment state of the own beacon slot position of other radio communication device notice and beacon period and add to beacon, described beacon period is occupied identifier and the beacon slot position that information comprises the mobile status information that radio communication device received from other, determined to notify the radio communication device of described mobile status information, and the step that sends at oneself beacon slot; And
Through behind the superframe of described defined amount, the step that oneself beacon is moved and sends to described idle beacon slot.
2. wireless communications method according to claim 1 is characterized in that, the counting of the superframe of described defined amount does not carry out during the beacon of other radio communication device exists before the beacon slot from oneself finished to beacon period.
3. wireless communications method according to claim 1 is characterized in that, the counting of the superframe of described defined amount is more than 2.
4. according to each described wireless communications method in the claim 1 to 3, it is characterized in that, described radio communication device, the described beacon and the described beacon period of passing through to be received are occupied information, when detecting the change as the beacon infrastructure of the configuration of the beacon slot position of radio communication device, carry out the detection of idle beacon slot and move the processing of the beacon slot position of oneself to described idle beacon slot beacon.
5. wireless communications method according to claim 1 is characterized in that, described mobile status information is the count value or the sign of mobile counter of the superframe of the described defined amount of counting.
6. wireless communications method according to claim 4, it is characterized in that, at least 2 time slots that described radio communication device will begin from the time slot at the rear of described beacon infrastructure are guaranteed with time slot as the entrant who does not carry out data communication, by new adding or add Radio Network System again when beginning the transmission of beacon, the time slot that will select with slotted random from described entrant is as own beacon slot position transmission beacon.
7. wireless communications method according to claim 6 is characterized in that,
Also have: described radio communication device is paid the step that is added on the beacon with the beacon slot length information, and described beacon slot length information represents from the position of the forefront of described beacon slot to the length of the rear time slot of the described beacon infrastructure of oneself recognizing,
The described radio communication device described beacon slot length information received from neighbour's radio communication device, the beacon slot length of maximum and described entrant with the length of time slot and during do not carry out data communication, and accept beacon.
8. wireless communications method according to claim 1 is characterized in that,
Described mobile status information also comprises the mobile destination time slot position information of the mobile intended destination of the beacon slot position of representing described radio communication device;
Radio communication device, beyond the beacon slot that other radio communication device of sending beacon before beacon slot to the beacon period from oneself finishes has been specified with described mobile purpose time slot position information, detect under the situation that has idle beacon slot, select in the described idle beacon slot any one, notify to other radio communication device as mobile purpose beacon slot position, and begin the counting of the superframe of described defined amount.
9. wireless communications method according to claim 8 is characterized in that,
Described radio communication device in described idle beacon slot, when the selection that is positioned at the beacon slot of forefront is judged, if described radio communication device itself is not the time slot that is positioned at rear, is not then selected the idle time slot of forefront.
10. wireless communications method according to claim 8 is characterized in that,
Described radio communication device is selected beacon slot arbitrarily in described idle beacon slot.
11. wireless communications method according to claim 1 is characterized in that, also comprises the steps:
In superframe counting to described defined amount, count value at oneself is under the peaked situation, from described mobile status information, detect whether there is other radio communication device, perhaps occupy to detect whether there is other radio communication device the information with described peaked count value from described beacon period with peaked count value; Count value at oneself is under the situation of maximum-1, detects whether there is other radio communication device from described mobile status information; In oneself count value neither maximum is not again under the situation of maximum-1, from described mobile status information, detect whether there is other radio communication device, perhaps occupy the whether existence detection step of other radio communication device of detecting the value that whether has count value+1 that has oneself the information from described beacon period with identical count value;
Whether exist when detecting step and detecting other radio communication device described, when described other radio communication device is positioned at the time slot position at rear, continue described counting, and oneself count value is resetted.
12. wireless communications method according to claim 11 is characterized in that,
When receiving the described beacon period that in described counting, has the count value identical when occupying information with oneself count value beyond maximum or 0, end described counting, oneself count value is reset to maximum.
13. wireless communications method according to claim 1 is characterized in that,
The described idle beacon slot of the mobile destination of the beacon slot of oneself is the beacon slot of free time of being positioned at the forefront.
14. a radio communication device is characterized in that, comprising:
The beacon receiving element, it receives beacon and extracts frame;
The frame identifying unit, it judges whether the frame that is extracted is beacon frame, to occupy information beacon period is recorded in the record cell, and record gives to the described beacon period of described beacon frame and occupies information, and described beacon period is occupied the whether mobile status information of mobile beacon time slot position of the identifier of radio communication device in the transmission source that information comprises the receiving slot position of beacon, specific described beacon and the radio communication device of representing described transmission source;
The beacon slot position control unit, it occupies information based on the whole described beacon period of writing down in the described record cell, when in beacon period, detecting beacon slot idle before the beacon slot of oneself, in mobile counter, set count value, receive the notice of countdown and indicate the change of the beacon slot position of oneself from described mobile counter with the superframe of the own defined amount of beacon slot before the beacon slot of described free time moves;
Beacon sends indicating member, its detect from the beacon slot position control unit indicated, oneself time slot position, and indication letter target transmission;
Frame constitutes the unit, it receives the indication that described beacon sends indicating member, constitutes the beacon frame that comprises following content: the described beacon period that is generated by received beacon is occupied information, oneself mobile status information and the beacon slot length information of the total length of the beacon slot representing to try to achieve from the beacon that oneself receives.
15. radio communication device according to claim 14 is characterized in that,
Do not carry out the counting of the superframe of described defined amount during the beacon existence of described mobile counter other radio communication device before the beacon slot from oneself finished to beacon period.
16. radio communication device according to claim 15 is characterized in that,
The counting of the superframe of described defined amount is more than 2.
17. radio communication device according to claim 14 is characterized in that,
Described beacon slot position control unit, occupy information by the described beacon and the described beacon period that receive, when the change that detects as the beacon infrastructure of the configuration of the beacon slot position of radio communication device, carry out the detection of idle beacon slot and move the processing of the beacon slot position of oneself to the beacon slot of described free time.
18. radio communication device according to claim 14 is characterized in that,
Described mobile status information is the count value or the sign of mobile counter of the superframe of the described defined amount of counting.
19. radio communication device according to claim 14 is characterized in that,
Described frame constitutes the unit, and at least 2 time slots that will begin from the time slot at the rear of being positioned at of described beacon infrastructure are provided with time slot as the entrant who does not carry out data communication,
Described beacon slot position control unit,, will send indicating member as own beacon slot position to beacon from the time slot that described entrant selects with slotted random and indicate by new adding or add Radio Network System again when beginning the transmission of beacon at radio communication device.
20. radio communication device according to claim 14, it is characterized in that, described frame identifying unit the described beacon slot length information received from neighbour's radio communication device, the beacon slot length of maximum and described entrant with the length of time slot and during, accept beacon;
Described frame constitute the unit the beacon slot length of described maximum and described entrant with the length of time slot and during in do not carry out data communication.
21. radio communication device according to claim 14 is characterized in that,
Described mobile status information also comprises the mobile destination time slot position information of the mobile intended destination of the beacon slot position of representing described radio communication device;
Described beacon slot position control unit, the specified beacon slot of described mobile destination time slot position information that sent other radio communication device of beacon before finishing to beacon period by the beacon slot from oneself exists under the situation of idle beacon slot in addition, the beacon slot of described free time is recorded in the described record cell as the mobile status information of beacon slot position, mobile destination with oneself, the count value of described regulation is set in the described mobile counter;
Described frame constitutes the unit, constitutes to comprise oneself the beacon frame of mobile status information that is recorded in the described record cell.
22. radio communication device according to claim 21 is characterized in that,
Described beacon slot position control unit, sent before the beacon slot from oneself finished to beacon period the predetermined beacon slot that moves of other radio communication device idle time slot in addition of beacon, the beacon slot that will be positioned at the forefront is appointed as mobile destination beacon slot.
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